How Reverse Osmosis works :

Reverse Osmosis processing is based on a reversal of the natural process of osmosis. This is why is
called “reverse osmosis” or “counter-osmosis” in Reverse Osmosis processing, a pressure greater
than the natural osmotic pressure is externally applied to a concentrated solution. This forces
water molecules to pass through a semipermeable membrane, from the concentrated solution into the
dilute solution, diluting the later even further. The concentrated solution (the higher
concentration levels in the raw water) is termed
the “concentrate” while the dilute solution (the partially demineralized water) is termed the
“permeate”